Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f6134989823d19c15920834d3ae2ad1f2d2cd3677be2fb3d58e6bd2a8dfa6d1' 
  AND token = 'UUzEibkuxKXw0XEBQFVkPAGdITcb48TK4IVS8enXFEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}